<template>
    <div>
        <!--面包屑-->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>商品管理</el-breadcrumb-item>
            <el-breadcrumb-item>商品分类</el-breadcrumb-item>
        </el-breadcrumb>
        <el-card>
            <el-row>
                <el-col>
                    <el-button type="primary" @click="showAddCateDialog">添加分类</el-button>
                </el-col>
            </el-row>
            <!--表格-->

            <tree-table :data="catelist" :columns="columns" :selection-type="false" :expand-type="false" :show-index="true" index-text="#" border :show-row-hover="false" class="treeTable">
                <template slot="isok" slot-scope="scope">
                    <i class="el-icon-success" v-if="scope.row.cat_deleted === false" style="color:lightgreen;"></i>
                    <i class="el-icon-error" v-else  style="color:lightgreen;"></i>
                </template>
                <template slot="order" slot-scope="scope">
                    <el-tag size="mini" v-if="scope.row.cat_level === 0">一级</el-tag>
                    <el-tag type="success" size="mini" v-else-if="scope.row.cat_level === 1">二级</el-tag>
                    <el-tag type="warning" size="mini" v-else>三级</el-tag>
                </template>
                <template slot="opt" slot-scope="">
                    <el-button type="primary" icon="el-icon-search" size="mini">编辑</el-button>
                    <el-button type="danger" icon="el-icon-search" size="mini">删除</el-button>
                </template>
            </tree-table>
            <!--分页--->
            <el-pagination
              @size-change="handleSizeChange"
              @current-change="handleCurrentChange"
              :current-page="queryInfo.pagenum"
              :page-sizes="[3, 5, 10, 15]"
              :page-size="queryInfo.pagesize"
              layout="total, sizes, prev, pager, next, jumper"
              :total="total">
            </el-pagination>
        </el-card>
        <!----添加分类的对话框---->
        <el-dialog
          title="添加分类"
          :visible.sync="addCateDialogVisible"
          width="50%" @close="addCateDialogClosed">
          <el-form :model="addCateForm" :rules="addCateFormRules" ref="addCateFormRef" label-width="100px">
              <el-form-item label="分类名称" prop="cat_name">
                  <el-input v-model="addCateForm.cat_name"></el-input>
              </el-form-item>
              <el-form-item label="父级分类">
                  <el-cascader v-model="selectedKeys" expand-trigger="hover"                  :options="parentCateList"                  :props="cascaderProps"                  @change="parentCateChanged" clearable></el-cascader>
              </el-form-item>
          </el-form>
          <span slot="footer" class="dialog-footer">
            <el-button @click="addCateDialogVisible = false">取 消</el-button>
            <el-button type="primary" @click="addCate">确 定</el-button>
          </span>
        </el-dialog>
    </div>
</template>
<script>
    export default{
        data(){
            return {
                queryInfo:{
                    type:3,
                    pagenum:1,
                    pagesize:5
                },
                catelist:[],
                total:0,
                columns:[
                    {
                      label:"分类名称",
                      prop:'cat_name'
                    },
                    {
                        label:'是否有效',
                        type:'template',
                        template:'isok'
                    },
                    {
                        label:'排序',
                        type:'template',
                        template:'order'
                    },
                    {
                        label:'操作',
                        type:'template',
                        template:'opt'
                    }
                ],
                addCateDialogVisible: false,
                addCateForm:{
                    cat_name:'',
                    cat_pid:0,
                    cat_level:0
                },
                addCateFormRules:{
                    cat_name:[
                        {required:true,message:'请输入分类名称',trigger:'blur'}
                    ]
                },
                parentCateList:[],
                cascaderProps:{
                    value:'cat_id',
                    label:'cat_name',
                    children:'children'
                },
                selectedKeys:[]
            }
        },
        created(){
            this.getCateList()
        },
        methods:{
            async getCateList(){
                const {data:res} = await this.$http.get('categories',{params:this.queryInfo})
                if(res.meta.status !== 200){
                    return this.$message.error('获取失败')
                }
                this.catelist=res.data.result
                this.total = res.data.total
            },
            handleSizeChange(newSize){
                this.queryInfo.pagesize = newSize
                this.getCateList()

            },
            handleCurrentChange(newPage){
                this.queryInfo.pagenum = newPage
                this.getCateList()
            },
            showAddCateDialog(){
                this.getParentCateList()
                this.addCateDialogVisible = true
            },
            async getParentCateList(){
                const {data:res} = await this.$http.get('categories',{params:{type:2}})
                if(res.meta.status !== 200){
                    return this.$message.error("获取父级分类失败")

                }
                this.parentCateList = res.data
               
            },
            parentCateChanged(){

                
                if(this.selectedKeys.length > 0){
                  //父级分类的ID
                    this.addCateForm.cat_pid = this.selectedKeys[this.selectedKeys.length-1]
                    this.addCateForm.cat_level = this.selectedKeys.length
                    return
                }else {
                    this.addCateForm.cat_pid = 0
                    this.addCateForm.cat_level = 0
                    return
                }
            },
            addCate(){
                this.$refs.addCateFormRef.validate(async valid=>{
                    if(!valid)return
                    const{data:res}= await this.$http.post('categories',this.addCateForm)
                    if(res.meta.status !== 201){
                        return this.$message.error('添加失败')
                    }
                    this.$message.success('添加成功')
                    this.getCateList()
                    this.addCateDialogVisible = false
                })                
            },
            addCateDialogClosed(){
                this.$refs.addCateFormRef.resetFields()
                this.selectedKeys = []
                this.addCateForm.cat_level = 0
                this.addCateForm.cat_pid = 0
            }
        }
    }
</script>
<style lang="less" scoped>
.treeTable{
    margin-top:15px
}
.el-cascader{
    width:100%;
}
</style>